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Articles 3481 - 3510 of 3917
Full-Text Articles in Life Sciences
Blood Levels Of 5-Bromo-2'-Deoxyuridine In Intraperitoneal Infusion For Determination Of Sister Chromatid Exchange Induction Using Hplc, Angelo Turturro, Narendra P. Singh, Johnny Bazare Jr., Ronald W. Hart
Blood Levels Of 5-Bromo-2'-Deoxyuridine In Intraperitoneal Infusion For Determination Of Sister Chromatid Exchange Induction Using Hplc, Angelo Turturro, Narendra P. Singh, Johnny Bazare Jr., Ronald W. Hart
Journal of the Arkansas Academy of Science
A new technique was developed to measure the amount of 5-bromo-2 '-deoxyurdine (BrdUrd), a thymidine analogue, rapidly and conveniently in blood, and it was applied to measure the concentration of BrdUrd during the initiation of a paradigm for the labeling of DNA to measure the induction of sister chromatid exchanges (SCE) by genotoxic agents. Radio labelled BrdUrd was used and blood was drawn from the abdominal aorta in pregnant Sprague-Dawley derived D rats. Using the hplc, the BrdUrd peak was easily identifiable and separable from its metabolites. The BrdUrd level in the blood stabilized in 30 minutes, and a level …
Status Of The Small-Footed Bat, Myotis Leibii Leibii, In The Southern Ozarks, V. Rick Mcdaniel, Michael J. Harvey, Renn Tumlison, Ken N. Paige
Status Of The Small-Footed Bat, Myotis Leibii Leibii, In The Southern Ozarks, V. Rick Mcdaniel, Michael J. Harvey, Renn Tumlison, Ken N. Paige
Journal of the Arkansas Academy of Science
No abstract provided.
Early Stages Of Prairie Restoration On A 1.5 Hectare Field In Faulkner County, Arkansas, Robert D. Wright, Donald E. Culwell
Early Stages Of Prairie Restoration On A 1.5 Hectare Field In Faulkner County, Arkansas, Robert D. Wright, Donald E. Culwell
Journal of the Arkansas Academy of Science
A plot of land on the University of Central Arkansas campus has been permanently designated as a Nature Reserve which is to remain much as it is with woods and open, grassy fields for class use and other educational purposes. The 1.5 hectare open field is a particularly good site for prairie restoration, since the area has not been under cultivation in recent time. Andropogon gerardi, A. scoparius, Sorghastrum avenaceum, Panicum virgatum, Liatris pycnostachya, Eryngium yuccifolium, Rudbeckia hirta, and Helianthus sp. are examples of plants naturally occurring here with some frequency. A number of other plants typical of prairie remnants …
Host Reactions And Physical Properties Of Four Isolates Of Tobacco Ringspot Virus, Lisa Smith, James M. Mcguire
Host Reactions And Physical Properties Of Four Isolates Of Tobacco Ringspot Virus, Lisa Smith, James M. Mcguire
Journal of the Arkansas Academy of Science
No abstract provided.
Two Year Comparison Of The Winter Food Habits Of Mink (Mustela Vison) From Deltaic Northeast Arkansas, Ronald A. Smith, V. Rick Mcdaniel
Two Year Comparison Of The Winter Food Habits Of Mink (Mustela Vison) From Deltaic Northeast Arkansas, Ronald A. Smith, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
Overwintering, Feeding Study Of Channel Catfish In Cages, Walter R. Robison
Overwintering, Feeding Study Of Channel Catfish In Cages, Walter R. Robison
Journal of the Arkansas Academy of Science
No abstract provided.
New Records For Troglobitic Asellids From Northwest Arkansas, Mark D. Schram
New Records For Troglobitic Asellids From Northwest Arkansas, Mark D. Schram
Journal of the Arkansas Academy of Science
No abstract provided.
River Otter In Arkansas: Ii. Indications Of A Beaver-Facilitated Commensal Relationship, C. Renn Tumlison, Mark R. Karnes, Anthony W. King
River Otter In Arkansas: Ii. Indications Of A Beaver-Facilitated Commensal Relationship, C. Renn Tumlison, Mark R. Karnes, Anthony W. King
Journal of the Arkansas Academy of Science
Dam building activities of beaver (Castor canadensis) create ponds that apparently augment habitat available to otter (Lutra canadensis). This paper considers possible effects of beaver activity and pond formation on distribution and populations of otter in Arkansas. Literature synthesis and analysis of harvest records were used to investigate the suspected relationship.
Selection Of Breeding Ponds By The Ringed Salamander, Ambystoma Annulatum, Peter P. Brussock, Arthur V. Brown
Selection Of Breeding Ponds By The Ringed Salamander, Ambystoma Annulatum, Peter P. Brussock, Arthur V. Brown
Journal of the Arkansas Academy of Science
No abstract provided.
Cave Fauna Of Arkansas: Further Records, James D. Dunivan, C. Renn Tumlison, V. Rick Mcdaniel
Cave Fauna Of Arkansas: Further Records, James D. Dunivan, C. Renn Tumlison, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
An Infestation Of The Bat Bug Cimex Pilosellus On An Arkansas Population Of Big Brown Bats (Eptesicus Fuscus), Alan D. Price, V. Rick Mcdaniel, C. Renn Tumlison
An Infestation Of The Bat Bug Cimex Pilosellus On An Arkansas Population Of Big Brown Bats (Eptesicus Fuscus), Alan D. Price, V. Rick Mcdaniel, C. Renn Tumlison
Journal of the Arkansas Academy of Science
No abstract provided.
Seven Significant Vascular Plant Records For Arkansas, J. H. Rettig
Seven Significant Vascular Plant Records For Arkansas, J. H. Rettig
Journal of the Arkansas Academy of Science
No abstract provided.
New And Interesting Plants For The Arkansas Flora From Northeastern Arkansas, Edward Leon Richards
New And Interesting Plants For The Arkansas Flora From Northeastern Arkansas, Edward Leon Richards
Journal of the Arkansas Academy of Science
No abstract provided.
Leaf Detritus Processing In An Ozark Cave Stream, Arthur V. Brown, Mark D. Schram
Leaf Detritus Processing In An Ozark Cave Stream, Arthur V. Brown, Mark D. Schram
Journal of the Arkansas Academy of Science
Detritus processing rates and mechanisms were investigated in an Ozark cave stream using post oak (Quercus stellata) leaf packs. The 5 g leaf packs lost ca. 30% of their dry weight within 84 days, resulting in a calculated K value of 0.05. This was an unexpectedly high rate of utilization. Diversity of invertebrates associated with the leaf packs was very low. Stygobromus ozarkensis (Amphipoda) was the only shredder. The two isopods, Caecidotea stiladactyla and Lirceus sp. were the only collectors observed other than a single species of oligochaete worm. Our data indicated that leaf detritus processing rates are virtually independent …
Feasibility Study For A Beaver Reservoir Agricultural Water Supply Volume I, James Ferguson, Robert Shulstad, William Bateman
Feasibility Study For A Beaver Reservoir Agricultural Water Supply Volume I, James Ferguson, Robert Shulstad, William Bateman
Technical Reports
An irrigation district of approximately 30,000 acres has been proposed to be located in Washington and Benton Counties in Northwest Arkansas utilizing water from Beaver Reservior. This report on the economic benefits of such a district is done under contract No. DACW03-81-C for the U.S. Army Corps of Engineers by the Water Resources Research Center at the University of Arkansas.
Feasibility Study For A Beaver Reservoir Agricultural Water Supply Volume Ii, James Ferguson, Robert Shulstad, William Bateman
Feasibility Study For A Beaver Reservoir Agricultural Water Supply Volume Ii, James Ferguson, Robert Shulstad, William Bateman
Technical Reports
An irrigation district of approximately 30,000 acres has been proposed to be located in Washington and Benton Counties in Northwest Arkansas utilizing water from Beaver Reservior. This report on the economic benefits of such a district is done under contr
Observations On The Occurrence Of Chalky Deposits On Forewings Of Oncometopia Orbona (F) (Homoptera: Cicadellidae), Mark A. Mayse
Observations On The Occurrence Of Chalky Deposits On Forewings Of Oncometopia Orbona (F) (Homoptera: Cicadellidae), Mark A. Mayse
Journal of the Arkansas Academy of Science
No abstract provided.
Economics Of Rainbow Trout Production In Arkansas, Walter R. Robison, Scott H. Newton
Economics Of Rainbow Trout Production In Arkansas, Walter R. Robison, Scott H. Newton
Journal of the Arkansas Academy of Science
No abstract provided.
Aquaculture Industry Of Arkansas In 1979-1980, Donald H. Fiegel, Mike Freeze
Aquaculture Industry Of Arkansas In 1979-1980, Donald H. Fiegel, Mike Freeze
Journal of the Arkansas Academy of Science
A survey of previous fish farmer certificate holders in Arkansas was conducted during 1979-1980 using renewal questionnaires, telephone conversations, and personal contacts. This survey was compared with similar surveys from preceding years. Approximately 51.0% of 12,372 intensively farmed hectares in 1979-80 were devoted to bait fish production, while 22.9% were utilized in food fish production. Acreage in bait fish, food fish, and fingerling production decreased from 1979 to 1980; however, price increases during this time resulted in a higher total value of the industry
Occurrence Of The Land Planarians Bipalium Kewense And Geoplana Sp. In Arkansas, James J. Daly, Julian T. Darlington
Occurrence Of The Land Planarians Bipalium Kewense And Geoplana Sp. In Arkansas, James J. Daly, Julian T. Darlington
Journal of the Arkansas Academy of Science
No abstract provided.
State Of Cytidine 3', 5' Cyclic Monophosphate (Cyclic Cmp) Research, Joseph E. Stone, Bruce E. Murphy
State Of Cytidine 3', 5' Cyclic Monophosphate (Cyclic Cmp) Research, Joseph E. Stone, Bruce E. Murphy
Journal of the Arkansas Academy of Science
No abstract provided.
Anomolies Of Bobcat Skulls (Felis Rufus) In Arkansas, C. Renn Tumlison, V. Rick Mcdaniel
Anomolies Of Bobcat Skulls (Felis Rufus) In Arkansas, C. Renn Tumlison, V. Rick Mcdaniel
Journal of the Arkansas Academy of Science
No abstract provided.
Pentatomidae Of Arkansas, Harvey E. Barton, Linda A. Lee
Pentatomidae Of Arkansas, Harvey E. Barton, Linda A. Lee
Journal of the Arkansas Academy of Science
A total of 30 genera and 53 species and subspecies of Pentatomidae are reported as occurring or possibly occurring in Arkansas. Fifty species and subspecies contained in 29 genera were collected or recorded from previously collected material. Based on distributional records in the literature, three additional species and one genus are listed as probably occurring in Arkansas. County and seasonal records are reported for each taxon.
Microhabitat Distribution And Its Effect Of Prey Utilization In Sympatric Populations Of Plethodon Glutinosus And Plethodon Dorsalis In Northwestern Arkansas, James M. Britton
Microhabitat Distribution And Its Effect Of Prey Utilization In Sympatric Populations Of Plethodon Glutinosus And Plethodon Dorsalis In Northwestern Arkansas, James M. Britton
Journal of the Arkansas Academy of Science
A study was done on sympatric populations of Plethodon glutinosus and P. dorsalis in northwestern Arkansas to determine the relative distribution of the two species and the relationship between their distribution and the utilization of available prey. Upon capture, total length, location, and habitat type were recorded for each salamander. Stomach content samples were obtained by forced regurgitation, and the animals were released. Samples of the local litter fauna were taken to determine prey availability. Habitat data were obtained for 171 salamanders; 76 P. glutinosus and 95 P. dorsalis. Stomach content samples were taken from 67 salamanders; 32 P. glutinosus …
Seasonal Abundance, Movement And Diversity Of Fishes In An Ozark Stream, Michael R. Dewey
Seasonal Abundance, Movement And Diversity Of Fishes In An Ozark Stream, Michael R. Dewey
Journal of the Arkansas Academy of Science
Seasonal fluctuations in fish abundance in Mud Creek occurred throughout the year at all sampling stations. At the two upper stations abundance was high and unstable during winter and early spring and decreased after heavy rainfall in mid-April. Abundance was low throughout the summer months, increasing in the fall due to large numbers of young-of-the-year. However, a different seasonal cycle occurred at the lower station which included deeper pools. Numbers were low and stable throughout the winter and early spring but high and unstable during the summer. Bigeye shiners (Notropis boops) and bluntnose minnows (Pimephales notatus) were the most mobile …
Biology Of The Striped Bass, Morone Saxatilis, In Beaver Reservoir, Arkansas, Raj V. Kilambi, Alex Zdinak Jr.
Biology Of The Striped Bass, Morone Saxatilis, In Beaver Reservoir, Arkansas, Raj V. Kilambi, Alex Zdinak Jr.
Journal of the Arkansas Academy of Science
Growth, length-weight relationship, maturation and food habits of striped bass from Beaver Reservoir were studied. No significant difference in growth in length between sexes was found. Growth of the Beaver Reservoir striped bass was similar to that of anadromous and freshwater populations. Males and females showed significant difference in length-weight relationship, and females exhibited isometric growth. The gonosomatic indices (GSI) of males ranged from 4.50 to 7.09 and were classified as mature fish. Female striped bass with GSI of 2.62 and above had three size groups of ova and were considered as maturing and mature. The food was primarily composed …
Classification And Protection Status Of Remnant Natural Plant Communities In Arkansas, William F. Pell
Classification And Protection Status Of Remnant Natural Plant Communities In Arkansas, William F. Pell
Journal of the Arkansas Academy of Science
A classification and inventory of Arkansas's remaining tracts of relatively undisturbed vegetation was initiated in 1979. Based on extensive literature surveys and field work, the classification includes five physiognomic classes, 17 cover classes, and 46 cover types, arranged hierarchically. High quality examples of ten of the cover types have been located in designated wilderness or state natural areas, where they are protected by law, while an additional three occur in research natural areas or Forest Service special interest areas. The remaining 33 cover types have no known long-term protection. Lands having wilderness, state natural area, research natural area, or special …
Preliminary Report On The Fishes Of The Upper Saline River, Polk And Howard Counties, Arkansas, And Observations On Their Relationships With Land Use And Physiochemical Conditions, Stephen A. Sewell
Journal of the Arkansas Academy of Science
The Saline River of southwest Arkansas was impounded by Dierks Lake in 1975. Intensive collecting efforts were made in the river system above Dierks Lake during March, April, and May 1980. Collected specimens were compared with ichthyofaunal lists prior to impoundment. Historic occurrants which were not collected include Notropis amnis, Notropis ortenburgeri, Moxostoma duquesnei, Ammocrypta vivax, and Percina copelandi. Additions to the ichthyofaunal list for the drainage include Fundulus notatus, Etheostoma spectabile, and Percina caprodes. The evidence indicates that 33 species representing six families inhabit the system from the headwaters in Polk County, Arkansas, to Dierks Lake, Howard County, Arkansas. …
Maturation, Spawning Period, And Fecundity Of The White Crappie, Pomoxis Annularis Rafinesque, In Beaver Reservoir, Arkansas, Janet L. Thomas, Raj V. Kilambi
Maturation, Spawning Period, And Fecundity Of The White Crappie, Pomoxis Annularis Rafinesque, In Beaver Reservoir, Arkansas, Janet L. Thomas, Raj V. Kilambi
Journal of the Arkansas Academy of Science
Gonosomatic indices and ovum diameter frequency distributions showed that the Beaver Reservoir white crappie spawns from late April through May. During the spawning season females release eggs more than once. Various stages of ovarian ovum development were described. Sexual maturity was found in 2-year-old females of 197 mm and 3-year-old and older fish. Regression analyses of fecundity on total length, weight and age of white crappie indicated that the fish weight was the best predictor of fecundity.
Fluorgraphic Technique For Detecting And Recording Chlorophyll And Its Derivatives On Paper And Thin-Layer Chromatograms, James L. Wickliff
Fluorgraphic Technique For Detecting And Recording Chlorophyll And Its Derivatives On Paper And Thin-Layer Chromatograms, James L. Wickliff
Journal of the Arkansas Academy of Science
Light from a blacklight lamp (General Electric BLB) is restricted to a waveband range 360 - 470 nm by cut-off filters consisting of 4cm 1 M aqueous CuSO4 and acrylic plastic sheets. This filtered lamp emission is used to excite the characteristic red fluorescence of chlorophyll and its derivatives on paper or thin-layer chromatograms. Fluorescent spots are detected and recorded by exposure of red-sensitive panchromatic photographic printing paper (Kodak Panalure) to the fluorescing chromatogram. A thin yellow filter interposed between the chromatogram and the photo print paper restricts the detected fluorescence to wavelengths greater than about 500 nm. Standard development …